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XInternAtom(3)                  XLIB FUNCTIONS                  XInternAtom(3)


NAME

       XInternAtom, XInternAtoms, XGetAtomName, XGetAtomNames - create or
       return atom names


SYNTAX

       Atom XInternAtom(Display *display, _Xconst char *atom_name, Bool
              only_if_exists);

       Status XInternAtoms(Display *display, char **names, int count, Bool
              only_if_exists, Atom *atoms_return);

       char *XGetAtomName(Display *display, Atom atom);

       Status XGetAtomNames(Display *display, Atom *atoms, int count, char
              **names_return);


ARGUMENTS

       atom      Specifies the atom for the property name you want returned.

       atoms     Specifies the array of atoms.

       atom_name Specifies the name associated with the atom you want
                 returned.

       atoms_return
                 Returns the atoms.

       count     Specifies the number of atom names in the array.

       display   Specifies the connection to the X server.

       names     Specifies the array of atom names.

       names_return
                 Returns the atom names.

       only_if_exists
                 Specifies a Boolean value that indicates whether the atom
                 must be created.


DESCRIPTION

       The XInternAtom function returns the atom identifier associated with
       the specified atom_name string.  If only_if_exists is False, the atom
       is created if it does not exist.  Therefore, XInternAtom can return
       None.  If the atom name is not in the Host Portable Character Encoding,
       the result is implementation-dependent.  Uppercase and lowercase
       matter; the strings "thing", "Thing", and "thinG" all designate
       different atoms.  The atom will remain defined even after the client's
       connection closes.  It will become undefined only when the last
       connection to the X server closes.

       XInternAtom can generate BadAlloc and BadValue errors.

       The XInternAtoms function returns the atom identifiers associated with
       the specified names.  The atoms are stored in the atoms_return array
       supplied by the caller.  Calling this function is equivalent to calling
       XInternAtom for each of the names in turn with the specified value of
       only_if_exists, but this function minimizes the number of round-trip
       protocol exchanges between the client and the X server.

       This function returns a nonzero status if atoms are returned for all of
       the names; otherwise, it returns zero.

       XInternAtoms can generate BadAlloc and BadValue errors.

       The XGetAtomName function returns the name associated with the
       specified atom.  If the data returned by the server is in the Latin
       Portable Character Encoding, then the returned string is in the Host
       Portable Character Encoding.  Otherwise, the result is implementation-
       dependent.  To free the resulting string, call XFree.

       XGetAtomName can generate a BadAtom error.

       The XGetAtomNames function returns the names associated with the
       specified atoms.  The names are stored in the names_return array
       supplied by the caller.  Calling this function is equivalent to calling
       XGetAtomName for each of the atoms in turn, but this function minimizes
       the number of round-trip protocol exchanges between the client and the
       X server.

       This function returns a nonzero status if names are returned for all of
       the atoms; otherwise, it returns zero.

       XGetAtomNames can generate a BadAtom error.


DIAGNOSTICS

       BadAlloc  The server failed to allocate the requested resource or
                 server memory.

       BadAtom   A value for an Atom argument does not name a defined Atom.

       BadValue  Some numeric value falls outside the range of values accepted
                 by the request.  Unless a specific range is specified for an
                 argument, the full range defined by the argument's type is
                 accepted.  Any argument defined as a set of alternatives can
                 generate this error.


SEE ALSO

       XFree(3), XGetWindowProperty(3)
       Xlib - C Language X Interface

X Version 11                     libX11 1.8.6                   XInternAtom(3)

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